symptom

拆除battery並且夾頭空置時,轉動套筒會令主軸同motor自由轉動,而唔係提供足夠鎖力用手緊或鬆夾頭。

拆咗battery,夾頭空置,轉動套筒會 1. 拆除battery,淨係用空夾頭測試主軸鎖。

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